+/**
+ * \par Description:
+ * Gets the system default method value for user feature used in cynara-creds.
+ *
+ * \par Purpose:
+ * Functions cynara_creds_dbus_get_user() and cynara_creds_socket_get_user() take a method
+ * parameter, which determines a kind of process feature (i.e UID, GID) returned by them.
+ * The described function provides implementation for obtaining a system default value
+ * for this parameter.
+ *
+ * \par Typical use case:
+ * The function might be called before cynara_creds_dbus_get_user() and cynara_creds_socket_get_user(),
+ * when functions shall be invoked with system default value of method parameter.
+ *
+ * \par Method of function operation:
+ *
+ * The function reads the value from /etc/cynara/cynara_user_creds file.
+ * Now the function is mocked up. It sets method to USER_METHOD_UID and returns CYNARA_API_SUCCESS.
+ * In the future the function will probably read the value from /etc/cynara/cynara_user_creds file.
+ *
+ * \par Sync (or) Async:
+ * This is a synchronous API.
+ *
+ * \par Thread safety:
+ * This function is thread-safe.
+ *
+ * \param[out] method Placeholder for system default user feature (like USER_METHOD_UID, USER_METHOD_GID)
+ *
+ * \return CYNARA_API_SUCCESS on success, negative error code on error
+ */